For the first round HR call, I gave HR slots but eventually had to follow their suggested timing even though the call is only a short 15 mins one. After the call, HR emailed and said the team was willing to interview me and only gave me 1 slot. Unfortunately, I was not free and communicated it via email. To my shock, after a few days, I received a rejection email. It seems like they only want YES men in this company, so if you're not one, then please dont interview with them. It is a waste of time.